12 Days of Christmas
80
Abundant Numbers
678
Card Number Validation
472
Collatz
689
Day of Week
622
Evil Numbers
741
Evil Numbers (Long)
726
Fibonacci
602
Fizz Buzz
553
Fractions
567
Leap Years
694
Niven Numbers
707
Niven Numbers (Long)
773
Odious Numbers
687
Odious Numbers (Long)
675
Prime Numbers
552
Prime Numbers (Long)
586
π
134362